Filer, Idaho has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 37.7 °F (low) to 62.3 °F (high). Annual precipitation averages 9.6 Inches. Filer is located in USDA Plant Hardiness Zone 7a. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 21.9 °F | 37.6 °F | 0.94 in. |
| February | 24.8 °F | 43.1 °F | 0.73 in. |
| March | 30.5 °F | 53.2 °F | 0.93 in. |
| April | 35.3 °F | 60.0 °F | 1.03 in. |
| May | 43.2 °F | 69.4 °F | 1.12 in. |
| June | 50.2 °F | 78.9 °F | 0.67 in. |
| July | 57.5 °F | 89.4 °F | 0.19 in. |
| August | 55.5 °F | 87.9 °F | 0.38 in. |
| September | 47.0 °F | 77.9 °F | 0.42 in. |
| October | 37.0 °F | 63.9 °F | 0.86 in. |
| November | 27.8 °F | 49.0 °F | 0.93 in. |
| December | 21.6 °F | 37.6 °F | 1.39 in. |
| Annual | 37.7 °F | 62.3 °F | 9.59 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 7a : 0°F to 5°F |
| Plant Hardiness Zone - 2012 | Zone 6b : -5°F to 0°F |
| Current Drought Conditions | Extreme Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |